Wire-line clamp



c. F. BUTTS.- WIRE um; CLAMP.

APPLICATION FILED MAY], I920- R ENEWE D MAR. 14, I921. LQQg 152Patented. Jan. 10?, 1922,,

2 SHEETS-SHEET 1.

INVENTOR ATTORNEY c. F. DOTTS. WIRE LINE CLAMP;

APPLICATION FILED MAY 7, 1920- RENEWED MAR. 14,1921.

. O 1 a 5 6 2 v 9 9. :I! d m 1 T A W I a a H \u iz .b J N 7 I. r d 2 H I1 I w w a P mws wzp srnrss CHRIST F. DOTTS, OF MILLVALE, PENNSYLVANIA,ASSIGNGR OF GNE-THZRD T DAVID IVLOOEE, 0F PITTSBURGH, PENNSYLVAEIIA.

VIIEE-LINE CLAMP.

Specification of Letters Patent.

Application filed. May 7, 1920, Serial No. 379,619. Renewed March 1%,1921. Serial No. 552,532-

To a] Z 11; host it may concern Be it known that I, Crime/r F. Do'r'rs,a citizen of the United States, residing at Millvale. in the county ofAllegheny andState of? Pennsylvania, have invented new and usefulImprovements in Wire-Line Clamps, or which the following is aspecification.

This invention relates to cl amps, and more particularly to wire lineclamps specially adapted for use in oil well drilling and similaroperations.

One of the main objects of the invention. is to provide a clamp ofsimple construction which is composed of a minimum of parts and may bereadily assembled. A further object is to provide a clamp composed oftwo similar member thus reducing the cost of production. Another objectis to provide simple and efficient means for connecting the griping jawsor elements of the clamp and for positively preventing relative verticalmovement of these jaws when the clamp is applied. Another object is toprovide clamp the jaws of which are so related and connected as to exerta maximum gripping efiect up the line, simple and eiiicient means beingprovided for forcing the jaws into gripping engagement with the line.Further Objects will appear from the detailed description.

In the drawings Figure 1 is a top view of a clamp constructed inaccordance with my invention.

Figure 2 is a front view.

Figure 3 is a back view.

Figure 4.- is a section taken substantially on line -at of Figure 1.

Figure is a top plan view of one of the clamp members.

Figure 6 is a clamp member.

In constructing the clamp .l provide two jaws l and 2 of segmental crosssection, each of these jaws being provided in its inner face with avertically extending groove 3 of arcuate cross section, these groovesbeing adapted to receive sections 4 of a suitable liner. Each section ofthe liner is provided with an outwardly projecting boss 5 which fitsinto a corresponding recess in the jaw, these bosses being bored andthreaded to receive screws 6 inserted through the jaws by mean of whichthe sections of the liner are detachably secured in position. The bosses5 serve to support the load thus resimilar view of the other lieving theusual collar 7 the upper end of the liner of strain.

Jaw 1 is provided adjacent to its lower end with an integral arm 8 oisubstantially circular shape, jaw 2 being provided adjsr cent to itsupper end with. a similar 9 which. is directed oppositely to arm 8. lihen the clamp is assembled. arm 8 ext rods aoont jaw 2 and arm 9 extendsabout the upper portion of jaw 1, these arn s serving to coin nect thetwo jaws as illustrated tor movement toward and away tron] each aboutthe common axis of the urn is. it l understood that the jaws lit snuglyin the connecting arms. Each jaw is p vided with integral houlder 10 theshoulders being in contact with the er and serving to positively preventrelat re vertical movement of the jaws, is further provided at its upperend n. I an integral arm or hook it. these hooks receiving the usualsuspending links 12 means of which the clamp is suspef l t"- the temperbar.

J aw 1 is provided with an outwardly projecting lever arm 13, jaw 52heing provided. with a similar arm 14-. ii. substantially ll-shapedclevis 15 i pivoted by a pin 16 to cars 17 projecting from the outerface of arm 13 adjacent o the outer end thereof.

A T-screw 18 is threaded through the bight of the clevis, and has itsinner end reduced to provide a pressure element 19 the inner end oi?which is rounded to fit into a corresponding recess in a boss 20 formedon the outer face of arm 14. Member 19 passes through. a block '21slidable between the arms of the clevis. the ends or this block beingslotted and fitting snugly about the clevis arms. cotter pin is insertedthrough clement l9 adjacent to the inner l ace of block 21. The block isthus connected to screw 18 so as to travel longitudinally of the rlcvisin accordance with operation of the screw. The block Zl. is positionedclosely adjacent to the inner end of element 19, and thi bloclr servesto ettectually brace this element so as to elimi nate breakage thereofwhile also serving to guide element 19 into engagement with boss 20.

As will be noted more clearly from Figure l, the inner ends of. jaws 1and 2 term radii of the circle enclosed by arms 8 and 9. and the groove3 of the jaws are positioned in advance of the axis about which the jawsoperate, the .point of intersection of the planes of the inner ends ofthe jaws being substantially coincident with this axis. \Vhen the clampis in gripping engagement with a cable the line of fulcrum of the jawson the arm 8 and9, indicated by line m-m in Figure 1, will passimmediately in back of the liner thus insuring a maximum grippingeffected for a given pressure exerted upon the lever arms 13 and 14. Bymeans of the screw 18 great pressure can be exerted upon these arm toinsure effective gripping of the line and effectually eliminate allpossibility of slippage thereof. As the jaws 1 and 2 are connecteddirectly to the temper bar and are effectually secured against relativevertical movement, I insure that the drilling apparatus will be properlysuspended, and excess strain upon any part of the clamp due to one jawbeing subjected to greater load than the other is eliminated.

What I claim is 1. In a wire line clamp, two clamping jaws, and meanscarried by and integral with said jaws for connecting the same so as tobe movable toward and away from each other. I

2. In a wire line clamp, two clamping jaws of substantially segmentalcross sec tion, an arm carried by each jaw and encircling the other jaw,said arms connecting the jaws for movement toward and away from eachother, and members carried by the jaws and in contact with the armsacting to prevent relative vertical movement of said jaws.

8. In a wire line clamp, two clamping jaws of segmental shape, each ofsaid jaws being provided with an outwardly project ing shoulder, and anarcuate arm carried by each of said jaws and encircling the other jaw,said arms fitting above and below said shoulders and connecting the jawsfor movement toward and away from each other, the arms and the shoulderscooperating to positively prevent relative vertical movement of thejaws.

4:. In a clamp the combination of two blocks constituting each acylindrical segment and provided each with an extension adapted toencircle the cylindrical surface of the other block, whereby the twoblocks are assembled rotatably upon a common axis, and means forexerting upon said blocksinthe direction of relative rotation a clampingstress.

5. In a clamp the combination of two blocks constituting each acylindrical seg,

ment and provided each with an extension adapted to encircle thecylindrical surface of the other block, whereby the two blocks areassembled rotatably upon a common axis, the said blocks being furtherprovided each with a lever arm and each with a workengaging recessspaced at an interval from the axis of turning.

In testimony whereof I affix my signature.

CHRIST F. DoTTs. I

